The Collaborative International Dictionary
Suffossion
Suffossion \Suf*fos"sion\, n. [L. suffossio, from suffodere,
suffossum, to dig under; sub under + fodere to dig.]
A digging under; an undermining. [R.]
--Bp. Hall.
Wiktionary
suffossion
n. A digging underneath; an undermine.